Good thing the trucks were stuck together and nothing was moved before the police got there. Their report should show that he was in your lane. His insurance should pay for you to get a truck, instead of just a Chevy Aveo or something. You are both very lucky to not have been hurt. Did the other driver stop at all? It probably won't matter much if the police report clearly shows other driver was in your lane.
Lastly, if you have his insurance information, don't wait for him, just call his company and turn in a claim yourself.